Update require.go.tmpl

Co-authored-by: Olivier Mengué <dolmen@cpan.org>

require/require.go.tmpl

@@ -1,5 +1,5 @@
 {{ replace .Comment "assert." "require."}}
-// Instead of returning a boolean result this function calls `t.FailNow()` on failure.
+// Failure of this check is fatal ([testing.T.FailNow] is called on failure).
 func {{.DocInfo.Name}}(t TestingT, {{.Params}}) {
 	if h, ok := t.(tHelper); ok { h.Helper() }
 	if assert.{{.DocInfo.Name}}(t, {{.ForwardedParams}}) { return }